Tie Down Apparatus

ABSTRACT

A tie down apparatus comprising a base, a biasing element, a torsion spring, and a shaft, wherein the base is die cast or plastic rejection molded and includes two side plates disposed on two sides thereof respectively, and between one ends of the side plates is mounted an engaging pillar, between another ends of the side plates is fixed a retaining member, between middle sections of the side plates is secured an abutting shank, the biasing element matches with the torsion spring and is axially fixed between the two side plates of the base by using the shaft, and is die cast or plastic rejection molded, and includes a contacting portion having a pressing piece extending from one side thereof, thereby cooling quickly after die casting or plastic rejection molding process to lower production time and cost, and enabling to decrease production material and cost.

BACKGROUND OF THE INVENTION

1. Field of the Invention

The present invention relates to tying apparatus, and more particularly to a tie down apparatus that is capable of tying an object tightly and being release easily.

2. Description of the Prior Art

A conventional tie down apparatus is used to wrap a strap for tying objects so as to prevent the objects from falling from the truck during transporting process.

Referring to FIGS. 1 and 2, a conventional tie down apparatus comprises a base 10, a biasing element 20, a torsion spring 30, and a shaft 40, wherein the base 10 is die cast or plastic rejection molded, and includes two side plates 101 disposed on two sides thereof respectively, and between one ends of the side plates 101 is defined an engaging pillar 102, between another ends of the side plates 101 is mounted a retaining pillar 103, and between middle sections thereof is fixed an abutting shank 104, the side plates 101 include two axial holes 105 formed between the engaging pillar 102 and the abutting shank 104 individually; the biasing element 20 is die cast or plastic rejection molded as well and includes a contacting portion 201 having an aperture 202, and a pressing piece 203 extending from one side of the contacting portion 201.

In assembly, the biasing element 20 and the torsion spring 30 are fixed between the two side plates 101 of the base 10, and the shaft 40 is inserted to the axial holes 105 of the side plates 101, the aperture 202 of the biasing element 20, and a central orifice of the torsion spring 30 so that the torsion spring 30 abuts between the biasing element 20 and the shaft 104 of the base 10, and the contacting portion 201 of the biasing element 20 retains to the engaging pillar 102 of the base 10 by using the torsion spring 30 to wrap the strap tightly.

However, such a conventional tie down apparatus has the following disadvantages:

1. The side plates 101 of the base 10, the engaging pillar 102 and the contacting portion 201 of the biasing element 20 are solid, thus prolonging cooling time after die casting or plastic rejection molding process to increase production time.

2. The side plates 101 of the base 10, the engaging pillar 102 and the contacting portion 201 of the biasing element 20 are solid, increasing material and the material cost.

The present invention has arisen to mitigate and/or obviate the afore-described disadvantages.

SUMMARY OF THE INVENTION

The primary object of the present invention is to provide a tie down apparatus that the side plates of the base include two recesses formed thereon individually, the engaging pillar is hollow, and the contacting portion of the biasing element includes the bores, thereby cooling quickly after die casting or plastic rejection molding process to lower production time and cost.

Another object of the present invention is to provide a tie down apparatus that the two side plates of the base include two recesses formed thereon individually, the engaging pillar is hollow, and the contacting portion of the biasing element includes the bores, thus enabling to decrease production material and cost.

A tie down apparatus in accordance with a preferred embodiment of the present invention comprises:

a base, a biasing element, a torsion spring, and a shaft, wherein the base is die cast or plastic rejection molded and includes two side plates disposed on two sides thereof respectively, and between one ends of the side plates is mounted an engaging pillar, between another ends of the side plates is fixed a retaining member, between middle sections of the side plates is secured an abutting shank, the biasing element matches with the torsion spring and is axially fixed between the two side plates of the base by using the shaft, and is die cast or plastic rejection molded, and includes a contacting portion having a pressing piece extending from one side thereof; such that the shaft is used to axially fix the biasing element and the torsion spring between the two side plates of the base so that the contacting portion of the biasing element retains to the engaging pillar of the base, tying an object tightly.

BRIEF DESCRIPTION OF THE DRAWINGS

FIG. 1 is a perspective view showing the exploded components of a conventional tie down apparatus;

FIG. 2 is a cross sectional view showing the assembly of the conventional tie down apparatus;

FIG. 3 is a perspective view showing the exploded components of a tie down apparatus according to a preferred embodiment of the present invention;

FIG. 4 is a perspective view showing the assembly of the tie down apparatus according to the preferred embodiment of the present invention;

FIG. 5 is a cross sectional view showing the assembly of the tie down apparatus according to the preferred embodiment of the present invention;

FIG. 6 is a cross sectional view showing the operation of the conventional tie down apparatus according to the preferred embodiment of the present invention.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

The present invention will be clearer from the following description when viewed together with the accompanying drawings, which show, for purpose of illustrations only, the preferred embodiment in accordance with the present invention.

Referring to FIGS. 3-5, a tie down apparatus in accordance with a preferred embodiment of the present invention comprises a base 1, a biasing element 2, a torsion spring 3, and a shaft 4, wherein the base 1 is die cast or plastic rejection molded and includes two side plates 11 disposed on two sides thereof respectively, and each side plate 11 is provided a recess 111 disposed on an outer side thereof, among one ends of the side plates 11 and the recess 111 is mounted a hollow engaging pillar 12, and between another ends of the side plates 11 is fixed a retaining member 13, between middle sections of the side plates 11 is secured an abutting shank 14 having an indentation 141, and between the engaging pillar 12 and the abutting shank 14 of the side plates 11 is formed an axial hole 15, the engaging pillar 12 includes an elongated teeth member 121 arranged thereon, the biasing element 2 is die cast or plastic rejection molded as well, and includes a contacting portion 21 having an aperture 211, two bores 212, lock teeth 213 arranged thereon, and a pressing piece 22 extending from one side thereof.

In assembly, the biasing element 2 and the torsion spring 3 are placed between the side plates 11 of the base 1, and the shaft 4 is inserted to the axial hole 15 of the side plates 11, the aperture 211 of the biasing element 2, and a central orifice of the torsion spring 3 so that the torsion spring 3 is abutted between a bottom surface of the pressing piece 22 of the biasing element 2 and the indentation 141 of the abutting shank 14 of the base 1, such that the contacting portion 21 of the biasing element 2 retains to the engaging pillar 12 of the base 1 by using the torsion spring 3.

As shown in FIG. 6, a strap 5 is fixed to the engaging pillar 12 of the base 1, and the pressing piece 22 of the biasing element 2 is pressed to rotate the biasing element 2 along the aperture 211, such that the contacting portion 21 of the biasing element 2 disengages from the engaging pillar 12 of the base 1 to insert another end of the strap 5, and then the pressing piece 22 is released to return original position by ways of the torsion spring 3, hence another end of the strap 5 is retained between the elongated teeth member 121 of the engaging pillar 12 of the base 1 and the lock teeth 213 of the contacting portion 21 of the biasing element 2, thereafter another end of strap 5 is pulled to tie an object tightly.

Thereby, the tie down apparatus of the present invention has the following advantages:

1. Due to the side plates 11 of the base 1 include two recesses 111 formed thereon individually, the engaging pillar 12 is hollow, and the contacting portion 21 of the biasing element 2 includes the bores 212, thereby cooling quickly after die casting or plastic rejection molding process to lower production time and cost.

2. Because the two side plates 11 of the base 1 include two recesses 111 formed thereon individually, the engaging pillar 12 is hollow, and the contacting portion 21 of the biasing element 2 includes the bores 212, thus enabling to decrease production material and cost.

While we have shown and described various embodiments in accordance with the present invention, it is clear to those skilled in the art that further embodiments may be made without departing from the scope of the present invention. 

1. A tie down apparatus comprising: a base, a biasing element, a torsion spring, and a shaft, wherein the base is die cast or plastic rejection molded and includes two side plates disposed on two sides thereof respectively, and between one ends of the side plates is mounted an engaging pillar, between another ends of the side plates is fixed a retaining member, between middle sections of the side plates is secured an abutting shank, the biasing element matches with the torsion spring and is axially fixed between the two side plates of the base by using the shaft, and is die cast or plastic rejection molded, and includes a contacting portion having a pressing piece extending from one side thereof; wherein the engaging pillar of the base is hollow.
 2. A tie down apparatus comprising: a base, a biasing element, a torsion spring, and a shaft, wherein the base is die cast or plastic rejection molded and includes two side plates disposed on two sides thereof respectively, and between one ends of the side plates is mounted an engaging pillar, between another ends of the side plates is fixed a retaining member, between middle sections of the side plates is secured an abutting shank, the biasing element matches with the torsion spring and is axially fixed between the two side plates of the base by using the shaft, and is die cast or plastic rejection molded, and includes a contacting portion having a pressing piece extending from one side thereof; wherein each side plate of the base is provided a recess thereon.
 3. The tie down apparatus as claimed in claim 2, wherein the recess is provided on an outer side of the side plate.
 4. A tie down apparatus comprising: a base, a biasing element, a torsion spring, and a shaft, wherein the base is die cast or plastic rejection molded and includes two side plates disposed on two sides thereof respectively, and between one ends of the side plates is mounted an engaging pillar, between another ends of the side plates is fixed a retaining member, between middle sections of the side plates is secured an abutting shank, the biasing element matches with the torsion spring and is axially fixed between the two side plates of the base by using the shaft, and is die cast or plastic rejection molded, and includes a contacting portion having a pressing piece extending from one side thereof; wherein the contacting portion of the biasing element has two bores. 